Funnel guide mounting



Nov. 12, 1946. H. o. DAVIDSON FUNNEL GUIDE MOUNTING Filed May 16, 1945 IN V EN TOR.

Patented Nov. 12, 1946 FUNNEL GUIDE MOUNTING Hobart 0. Davidson, Swarthmore, Pa., assignor to American Viscose Corporation, Del., a corporation of Delaware Wilmington,

Application May 16, 1945, Serial No. 594,096

6 Claims.

This invention relates to an improved funnel guide mounting. More particularly the invention relates to a mounting for the funnel through which filamentary material, produced in accordance with the viscose process, for example, may be led into a spinning bucket in which it is collected in the form of an annulus.

The invention is concerned especially with funnel mountings of the type shown in Rushton 1,672,691 adapted to swing the funnel into oper ative position in the spinning bucket, and to swing the funnel clear of the bucket when a cake of filamentary material collected therein is ready fQi' (lemma. 1

The type of invention is an improvement comprises a support adapted tobe' secured to the traverse rail of a spinning machine, means for holding the funnel, and two parallel pairs of arms arranged between the support and funnel-holding means, and pivotally connected to each of them. In funnel mountings of the general type described which have been available prior to the present invention, the arms connecting the support and funnel-holding means have been pivotally mounted on the support and holding means by pivots which also constitutepart of the. means for adjusting the tightness of the joints between the arms and the connected parts. In addition, such adjusting means have been located in exposed positions where they have been subject to corrosion by the acid escaping from the spinning machine. r

Experience has shown that because of the corrosive effects of the acid in the neighborhood of the machine, the joints of the funnel-mountings sometimes tend to become stifi and unworkable after only short periods of use, and require constant readjustment. Further, since the pivots and adjusting means are interdependent, the constant swinging of the arms on their pivots has a loosening effect on the joints so that when the parts are not used under corrosive conditions and sometimes even when used under such conditions, retention thereof in a predetermined tight but relatively movable condition frequently requires readjustment.

It is a primary object of the present invention to provide a swingable funnel mounting which functions smoothly and maintains its tightness at all times over long periods of use. Another object is to provide a funnel mounting of the type described in which the means for tightening the joints is independent of the pivotal means connecting the pairs of parallel arms to the supmounting of which the present.

a somewhat enlarged scale.

7 2 port andto the funnel-holding means and the surfaces of the joints, between which the adjustable predetermined pressure is exerted to control the ease of relative motion at the joints, are situated Well within .the joint so that the parts of the joint protect these surfaces from the influ ence of foreign matter and corrosion, thereby minimizing any tendency of the parts of the joint to bind or to become substantially more difiicult tomove during periods of operation when ex-' Figure 4 is a detail View of a modified joint; I

and

Figure 5 is a view showing a, modified much In the drawing there is shown a portion of a spinning'bucket. 2 provided with a cover 3. A traverse rail 4 is provided to impart relative vertical reciprocal movement between the spinning bucket 2 and the funnel guide 5 for laying the filamentary material in-a series of layers against the inside wall of the bucket. The filamentary material is introduced into the bucket through funnel 5 having a stem 6 extending into the bucket through aperture 1 in cover 3. The holding means'for the guide 5 comprises a threaded bushing 12, an extension 9 of a, movablemember l0, and the nuts 8 for adjustably holding the. guide and bushing in fixed position on the extension lfl. Secured to traverse rail 4 by bolts I3 is a support 14. V

Support I 4 is connected with movable member l0 of the funn'elrholding means bytwo pairs of arms [5 arranged in parallel. relation one pair above the other, each pair of arms being pivotally connected to support Hand movable member! by means of pivot pins l5. The pins l5 may extend from bosses or equivalent parts of the movable member I!) and the support it into bores within the arms i5, as shown, or they may extend from the arms l5 into recesses formed within the movable member 10 and the support l4. However, each pin l6 has an end'bearing generatrix is inclined to the axis, preferably conical as shown at I! in Figures 1 and 2, or spherical, as shown at llb in Figure 5, which engages a mating end surface of the bore, such as those in the arms l5, into which the pins extend, this engagement leaving clearances (clearly shown in Figure 2) around the pins l6 betweentheends of the arms [5 and *the adjacentface's of support [4 as well as the adjacent faces of the member I0, thereby avoiding the exertion of any pressure between the faces of the arms and the adjacent faces of the movable member10-andthesupport [4. The use of a spherical or conical bearing surface also assurestrue' and-accurate positioning of the parts and the-maintenanceof-- such positioning even when light pressure only is placed upon such bearing surfaces.

The two arms l5 constituting each pair are adjustably joined together by shouldered studs I8 which screw into threaded holes I9 in the inner facesof. the arms. The ends of-the studs are threaded oppositely; that is, one end is left-hand and the other right-hand-so that turning of the knurled portion intermediate the shoulders tightens rloosens the connection betweenthe stud and the pair of arms. Gaskets 2ll-such as of rubber, may be provided between the arms l' and theshoulders of studs [8. Studs I8, which in co-operation with the threaded holes in the sides of the arms afford a ready means of simultaneouslyeadjustingithe relation of the arms I5 to set the joints in any desired tightness, are

disposed intermediatelyof andindependently of l the pivot pins l6 whereby the arms are con nectcd to support HI and memberrl ll. The studs are readily available for adjustment by the operator. a

The pivotal movement of the arms on'the support l4 and member In of'the funnel-holding means does not affect the studs or exert friction thereon, causing undue wear or loosening thereof, and the parts are retained in the adjusted position until changed by the operator. The bearing surfaces Il -of the pivot pins which control the ease ofmanipulation ofthe jointare entirely enclosed within the arms or within support I 4 and member 10 and are not affected by acid escaping from the spinning machine, so that the arms remain as freely swingable as when originally, adjusted over an indefinite period of time and the funnel mounting does not become stiffor unworkable. The funnel mounting maybe constructed in its entirety of anysuitable acidresisting material,such as a resinous material .of the type of Bakelite or- Durez, for instance and, preferably, pivot pins are molded orotherwise formed integrally with the arms or members I0 and I4;

Figure 4 illustrates amodifiedjoint in which the pivot pin lfia extends from the inner surface of arm l5 into a bore within the member H! (or' supportld). The pin [6a has a flat end surface Ila which bears against .a corresponding flat bottom surface. atthe end of the bore, leaving a clearance between the adjacent surfaces on arm l5 and member I 0 (or support I4). The fiat surface I larmay be considereda surface ofrevolution generated by a line inclined atrightangles tothe axis. If desired, a smaller bore or recess Heb may be made in the'end of the large bore to facilitate separation'of the parts when it is desired to dismantle the mounting structure.

Figure 5 shows a pin I6 having an end bearing surface llb of spherical character;

Modifications may be made in the apparatus disclosed herein without departing from the spirit and scope of the present invention which is not to be limited except as necessitated b the appended claims.

I claim:

I. A guide mounting comprising means for holdingthe guide, a support, and at least one pair of arms arranged therebetween in parallel relation, pivotal means connecting adjacent ends of the arms with the support and additional pivotal means connecting the other adjacent ends of the arms with the guide holding means, each of said pivotal means comprising a pin extending into a bore and'having a bearing surface comprising-a surface of revolution whose generatrix is inclined to the axis of the pin in engagement with a corresponding bearing surface within the bore and clearances around the pins and disposed between the support and the adjacent ends of the arms and between the guide holdingmeans and'the adjacent ends of'the arms, and means independent of the-pivotal connections disposed intermediately of eachLpair of arms for adjustably joining thearms of a pair together.

2. A guide. mounting comprising meansfor' holding the guide,.a support, andat leastone pair of arms arrangedtherebetween in parallel relation, pivotal means connecting adjacent ends of the arms with the support and additional pivotal means connecting the-other adjacent ends of the arms with the guideholding means, eachof said pivotal means comprising a pin extendinginto a'bore and having a terminal bearing surface comprising-a surface of revolution whose 'generatrix is inclined to the axis of the pin in engagement with a corresponding bearing surface within and adjacent the bottom of the bore and clearances around the pins and disposed between the support and-the adjacent ends of the arms and between the guide holding means and the adjacent ends of the arms, and-means independent of thepivotal connections disposed intermediately of each pair of arms for adjustably joining the arms of a pair together.

3. A guide mounting comprising means for holding the guide, a support, at least one pair of arms arranged therebetween in parallel relation, pivotal means adjacent ends of the arms with the support and additional pivotal meansconnecting other adjacent ends of the arms with the guide holding-means, each of said pivotal means comprising a pin extending into a bore and having a bearingsurface comprising a surface of revolution whose generatrix is inclined to the axis of the pin in engagement with the corresponding bearing surface within the bore and clearances around the pins and disposed between the support and the adjacent ends of the arms and between the guide holding means and the adjacent ends of the arms, means disposed intermediately of and independentlyof the pivotal means for adjustably connecting the arms of each pair together, said connecting means comprising oppositely-threaded studs co-operating with correspondingly threaded bores in the arms.

additionalpivotal .means connecting the other adjacentends of the armswith the guide holding r means, each of said pivotal means comprising .a. pinextending into-a'bore andwhaving a conica bearing surface adjacent its end in engageme with acorres'ponding conical bearing surface adjacent the bottom of the bore and clearances around the pins and disposed between the support and the adjacent ends of the arms and between the guide holding means and the adjacent ends of the arms, and means independent of the pivotal connections disposed intermediately of each pair of arms for adjustably joining the arms of a pair together.

5. A guide mounting comprising means for holding the guide, a support, two pairsof arms arranged therebetween in parallel relation one pair above the other, pivotal means connecting adjacent ends of the arms with the support and additional pivotal means connecting the other adjacent ends of the arms with the guide holding means, each of said pivotal means comprising a pin extending into a bore and having a spherical bearing surface adjacent its end in engagement with a corresponding spherical hearing surface adjacent the bottom of the bore and clearances around the pins and disposed between the support and the adjacent ends of the arms and between the guide holding means and the adjacent ends of the arms, and means independent of the pivotal connections disposed intermediately of each pair of arms for adjustably joining the arms of a pair together.

6. A guide mounting comprising means for holding the guide, a support, two pairs of arms arranged therebetween in parallel relation one pair above the other, pivotal means connecting adjacent ends of the arms with the support and additional pivotal means connecting the other adjacent ends of the arms with the guide holding means, each of said pivotal means comprising a pin extending into a bore and having a fiat bearing surface adjacent its end in engagement with a corresponding fiat bearing surface adjacent the bottom of the bore and clearances around the pins and disposed between the support and the adjacent ends of the arms and between the guide holding means and the adjacent ends of the arms, and means independent of the pivotal connections disposed intermediately of each pair of arms for adjustably joining the arms of a pair together.

HOBART O. DAVIDSON. 

